Page 38 of 110 Pages
6.6 Program 9: Vacuum Test (PV, pre-vacuum model only)
Vacuum is produced in the chamber down to P1=15 kPa. At this stage
all the valves close. The autoclave remains in this stage for 5 minutes.
This period enables the condition in the chamber to reach equilibrium.
After the 5 minutes have elapsed, the printer records the pressure that is
referred to as P2. At this point the test begins and lasts 10 minutes.
At the end of the test, the printer records the results. The pressure at the
end of the test is referred to as P3. The rate of change of P3-P2 shall not
exceed 0.13 kPa/min.).
If P3-P2 exceed 0.13 kPa/min the printer will print “FAIL”. If P3-P2 is
within the required value, the cycle will end normally.
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